A Simple Defected Ground Structure with Elliptical Lowpass filtering Response

Author

Parui, Susanta Kumar ; Das, Santanu

Author_Institution

Dept. of Electron. & Telecommun. Eng., Bengal Eng. & Sci. Univ., Howrah

fYear

2007

fDate

11-14 Dec. 2007

Firstpage

1

Lastpage

4

Abstract

A new defected ground structure (DGS) consisting of three numbers of circular slots connected by two thin slots underneath a microstrip line is proposed. Both simulated and measured S-parameter results shows a very sharp lowpass filtering characteristics with one number of pole and one number of zero at finite frequencies. Thus DGS unit is modeled by 3^nd order elliptical lowpass filter. Cascading two cells under microstrip line realize a 3-pole lowpass filter. By replacing simple microstrip line by HI-LO line, improved filter performance is obtained.

Keywords

low-pass filters; microstrip filters; microstrip lines; 3-pole lowpass filter; 3nd order elliptical lowpass filter; circular slot; defected ground structure; elliptical lowpass filtering response; microstrip line; Attenuation; Capacitance; Cutoff frequency; Electronic mail; Filtering; Frequency measurement; Inductance; Microstrip filters; Microwave filters; Poles and zeros; defected ground structure; elliptical response; microstrip filter;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2007. APMC 2007. Asia-Pacific

Conference_Location

Bangkok

Print_ISBN

978-1-4244-0748-4

Electronic_ISBN

978-1-4244-0749-1

Type

conf

DOI

10.1109/APMC.2007.4554662

Filename

4554662